Safety boiler attachment.



D. O. TILMAN 6: 0. U. SCHEIBNER.

SAFETY BOILER ATTACHMENT.

APPLICATION FILED SEPT.2 5, 1911.

Patented Mar. 30, 1915.

[N VE N T 0R5 Daniel 0. TiZmarz 0110 C 80 ezb'mr Allorm y WITNESSES THE NORRIS PETERS 60., P" n' LITHQ. WASHINGTON, D, C,

UNITED STATES PATENT OFFICE.

*IDANIEI: O. TILMAN OTTO C. SCHEIBNER, OF PARSONS, KANSAS.

SAFE-TY BOILER ATTACHMENT.

7 Specificationof Letters Patent.

Patented Mar. 30, 1915.

Application filed September 25, 1911. Serial No. 651,167.

have invented certain new and useful Improvements in Safety Boiler Attachments, of which the following is a specification,

reference being had to the accompanying drawings.

This inventionhasrelation to certain new .and useful improvements in safety valves used in connection with steam boilers; and the object of our invention is to provide a device of this general character, of a simple and inexpensive nature and of a compact and durable construction, which shall be capable of convenient and accurate adjustment in position adjacent to and in communication with a steam boiler, to automatically and audibly indicate low water.

Another object of our invention is to provide a valve arranged to operate in connection with a supplemental valve to operate an injector, inspirator or water pump.

A further object is to provide a steam boiler with an automatically operated valve employedto preventexplosions due to low water, our valve being arranged to synchronously operate an audible signal and a controlling mechanism employed in connection with an injector, inspirator or water pump. p 7

With these and other objects in view the present invention consists in the combination and arrangement of parts as will be hereinafter more fully described and finally pointed out in the appended claims, it being further understood that changes in the specific structure shown and described may be made within the scope of the claims, without departing from the spirit of the invention.

In the accompanying drawings forming apart of this specification and in which like numerals of reference indicate similar parts in the several views: Figure '1, shows an .elevational view disclosing, a fragmentary portion of a steam boiler equipped with our automatic valve. Fig. 2, is a lengthwise sectional view through the valve housing. Fig. 3, is a section on line 3, 3, of Fig. 2, looking in the direction of the arrow, and Fig. 4, shows an enlarged perspective view of one of the winged chairs as employed in connection with our invention. Fig. 5, shows a sectional detail of the splasher.

Primarily our invention comprises a valve operated by a heated motive fluid under pressure, such as steam, to actuate a controlling mechanism, permitting an inflow of water into a steam boiler at a predetermined instant.

' In the drawings the letter A, designates a steam boiler of conventional construction, from which extends the intake pipe 9. This pipe enters the cylindrical housing 10, at a point approximately mid-length of its ends. The cylindrical housing is of brass or other suitable material sensitive to heat, and

at each end is exteriorly threaded, as clearly shown in Fig. 2. Threaded upon the upper end of the cylindrical housing 10, is the cap nut 11, while to the opposite end is secured the base nut 12. Communicating with centrally disposed apertures formedin the aforesaid cap and base nuts 11 and 12 are secured pipes 13 and 14, the former of which conducts steam to and within the cylindrical housing 10, while the latter under certain conditions as hereinafter described, carries the steam received thereby ofl. As shown in Fig. 1, this exit pipe 14, at a point below the cylindrical housing 10, is provided with a drain bib 15. Secured to the end of this pipe 14, is the cylinder 16, while connected to the T 17, forming a part of the pipe 14, is an ordinary valve 18, from which extends the whistle 19, which forms anaudend of the taper.

Held approximately mid-length within the cylindrical housing 10, is a disk 20, having the peripheral stub channels a. This disk 20, is of cast-iron or some other material which should be less sensitive to heat than the housing 10, and is in water-tight connection within the cylindrical housing at a normal temperature; As disclosed in Fig. 2, the top of the diskQO, is on a level with the center of the intake pipe 9. This insures the water within the cylindrical housing 10, above the disk draining out of the same when the water level within the boiler A, reaches a point below the top of the disk.

In order to properly hold the disk 20, within the cylindrical housing, we provide the winged chair C, which at its lower end has an access opening 6, arranged to register with the end of the pipe 14, as shown in Fig. 2. This access opening is provided so that the wings will not obstruct the pipe opening. Held above the disk 20, is the winged chairsB, which also has an access opening 0, arranged to register with the end of the steam pipe 13. Reciprocating within the cylinder 16, secured to the end of the pipe 14, is the piston 26, shown in dotted lines in Fig. 1, and projecting from this pis ton is the operating stem 22.

Secured to the stem 22, is the rock lever 23, pivotally held upon a supporting pin 24. This stem 22, is guided within the bracket 24',extending from the piston 26. and working upon this stem 22, to normally hold the piston 26, in retractile position isthe coil spring 25. This plunger or piston 26, shown in dotted lines,.normally closes the end of the exit pipe 14.

Extending from the remaining end of the i rock lever 23, isthe valve stem 27, at its end carrying the disk 28, which works in conjunction with the seat 29, forming a part of the throttle "valve 30. This valve 30, by means of the pipe 31, is in communication with the supply pipe 32. The pipe 31, enters a T34, while extending from the throttle valve 30, is the pipe 33, entering the T 35,

these pipes 31 and 33, forming a by-pass. Extending from the T 35, and entering the T 34, is the pipe-37, provided with an ordinary valve 38, while continued from the T 35, is the supply pipe 39, entering the valve 40, in communicationwith the steam boiler A.

The operation of our device is very simple;

The cylindrical housing 10, being made of brass, which is very much more sensitive to s different temperatures than isthe cast-iron disk-'20, will expand as soon as the water drains out of the chamber above the disk 20;

This draining of the cylindrical chamber 10,

only occurs when the water level within the boiler A, falls below the pipe 9. As soon as thesteam, which is much hotter'than the water enters the cylindrical chamber 10,

above the disk,'the chamber expands within certain limits, but-sufficiently to permit the steam which escapes from the boiler A, through the pipes 9 and 13, to pass between the disk 20, and the chamber 10, into the lower i portion of the chamber and from thence-through the pipe 14, into the cylinder 16. There the elastic fluid exerts a pressure upon the piston 26, to actuate the same, which results in a rocking movement being imparted to the lever 23, which in turn un- 1' seats the valve '28. In the meantime, the

' valve 18, will have been so setthat a portion of the steam will escape through this valve to operate the audible alarm which is in the form of the whistle19. As soon as the valve .28, is unseated, steam willpass from boiler through pipes 39, 33, 31' and 32, to injector,

inspirator or water pump, which will'work cutting oil all escape of steam through the .housing 10. A part of the steam in the cylinder is permitted to pass through the drain cock 15, which is also set tobeslightly open.

As soon as the steam pressure is cut out from the exit pipe 14, the spring pressed into water-tight connection with the disk 20, r

plunger-26, againresumes its normal :posif 7 tion, and operates the lever 23, to close the valve 28. The instrumentalities will remain in their normal closed positions until the water in the boiler again-recedes below the top of the disk20.

Where our device is employed in connec- 1:

tion witha locomotive boilera splasher is necessary at the end of pipe9. In Fig. '1

the'splasher 43 is threaded into the boiler A.

This splasherhas the central bore 44 and the f o lateral channels 45, constructed as illustrated in Fig. 5. The splasher will protect the pipe!) against any inflow of water due to the rocking movement ;of the locomotive.

' The attachment ofthis valveto a; steam boiler may be efiected in any, suitable workmanlike manner,and is adapted to be used 1n con unct1on wlth anf1n ector, lnspirator,

or water pump. V

The device is simple'and inexpensive construction and both durable and eflicient in operation, and theoperation of thevalve is prompt and positive.

Having thus described our said invention,

what we claim as new and desire to secure by United States Letters Patent is j 1.. In a device of the character described,

the combination of a cylindrical housing made of material sensitive to heat, a diaphragm withinsaid housing less sensitive to;

housing at a predetermined temperature, means to support said disk within said housing, an exitpipe extending from said housheat and in water-tight connection with said i ing, a bib within said exit pipe, asp ring, V

operated plunger connected to' said exit pipe, ,a throttle valve, means to conneotssaid plungerj'to said valve, a supply'pipe entering 1 said ;valve,5 an escape pipe extending'fr'om saidvalve, and a valve within said-exit'pipe connected to an audiblesignah 2. In combination, a cylindrical housing made of metal sensitive'to heat, adisk 7 within said cylindrical housingless sensitive V to heat and in water-tight connection there-1 L with at,v a normal temperature,:an intake pipe entering said cylindrical housing-above said disk, a live steam pipe extending from theupper end'of said cylindrical housing, an exit pipe extending from the'slower end s of said cylindrical housing,-a winged chair below said disk and supporting the same, a

Winged chair upon said disk, said chairs determining the location of said disk Within said cylindrical housing, a valve Within said exit pipe, a Whistle extending from said escape valve, a drain bib communicating With said exit pipe, a cylinder at the end of said exit pipe, a piston Within said cylinder, a rock lever actuated at times by said piston, a normally closed check valve, said rock lever being attached to said normally closed throttle valve, an intake pipe entering said normally closed valve, and an exit pipe extending from said normally closed valve, all arranged to operate substantially as and for the purpose set forth.

In testimony whereof, We aiiix our signature in presence of tWo Witnesses.

DANIEL O. TILMAN. OTTO C. SCHEIBNER. Witnesses:

GEORGE H. HOFFMAN, J OHN L. BECK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of lEatents, Washington, D. G. 

